نتایج جستجو برای: multinuclear nmr

تعداد نتایج: 59408  

Journal: :Magnetic resonance in chemistry : MRC 2013
Bernd Wrackmeyer Elena V Klimkina Thomas Schmalz Wolfgang Milius

Tetramethyldivinyldisilazane-(triphenylphosphine)platinum(0) was prepared, characterized in solid state by X-ray crystallography and in solution by multinuclear magnetic resonance spectroscopy ((1)H, (13)C, (15)N, (29)Si, (31)P and (195)Pt NMR). Numerous signs of spin-spin coupling constants were determined by two-dimensional heteronuclear shift correlations (HETCOR) and two-dimensional (1)H/(1...

2013
Bernd Wrackmeyer Peter Thoma Wolfgang Milius

Two cyclic alkyl(aryl)boranes, a 1-bora-indane derivative 1, and a tricyclic derivative 4, containing the boron atom in a six-membered ring, were structurally characterized by NMR techniques in solution. The solid-state structure of the 1-bora-indane 1 was determined by X-ray crystallography. The reactivity of these cyclic alkyl(aryl)boranes towards monoalkynyltin compounds, Me3Sn–C≡C–Me and Me...

2013
RAGINI SINHA SUDHA SRIVASTAVA GIRJESH GOVIL

Modified flavone derivatives show diverse pharmacological effects, which may be attributed to their interaction with lipid membranes. We have studied the interaction of Chrysin (C) and some novel flavone derivatives, 4 ́–methoxyflavone (C1), 4 ́– chloroflavone (C2) and 4 ́–nitroflavone (C3) with dipalmitoylphosphatidylcholine (DPPC) using molecular dynamic (MD) simulation, differential scanning ca...

2015
Pavel Štarha Lucie Hanousková Zdeněk Trávníček Jason B. Love

A series of organometallic half-sandwich dichloridoruthenium(II) complexes of the general formula [Ru(η6-p-cym)(naza)Cl2] (1-8; p-cym = p-cymene; naza = 7-azaindole or its derivatives) was synthesised and fully characterized by elemental analysis, mass spectrometry, and infrared and multinuclear NMR spectroscopy. A single-crystal X-ray structural analysis of [Ru(η6-p-cym)(2Me4Claza)Cl2] (6) rev...

Journal: :Chemistry 2012
Heiko M Möller Moritz C Baier Stefan Mecking Evgenii P Talsi Konstantin P Bryliakov

To characterize the origin of living polymerization with nonmetallocene titanium-based catalysts containing o-fluoroaryl substituents, ethene polymerization by an o-fluorinated bis(enolatoimine) titanium catalyst and its nonfluorinated counterpart has been studied by multinuclear NMR spectroscopy by using methylaluminoxane (MAO) or AlMe(3)/CPh(3)B(C(6)F(5))(4) as activators. Formation of ion pa...

Journal: :Metal-Based Drugs 1994
Francesco Caruso J. Tanski M. Rossi C. Smart

New gold(I)-phosphine complexes have been synthesized and studied using multinuclear 1H. and 31p-NMR spectroscopy and X-my diffraction methods. 31p-NMR is particularly helpful as it distinguishes between phosphorus atoms in different chemical environments. Gold(Ill) salts were easily reduced in situ. A variety of diphosphines, L PPh2(CH2)nPPh2, n 1-4, and one triphosphine, triphos, CH3C(CH2PPh2...

Journal: :Inorganic chemistry 2013
Anurag Mishra Hyunji Jung Min Hyung Lee Myoung Soo Lah Ki-Whan Chi

Two new metallarectangles, 4 and 5, were obtained from the self-assembly of areneruthenium-based molecular clips 2 and 3 with a new dipyridyl donor ligand 1 containing a diamide core and ethynyl spacers. The metallarectangles were characterized by multinuclear NMR, electrospray ionization mass spectrometry, and UV-vis spectroscopy, and the molecular structure of 4 was unambiguously determined b...

Journal: :Molecules 2007
Rosa María Claramunt Dolores Santa María Elena Pinilla M Rosario Torres José Elguero

2-(2,4-Dimethylphenyl)-2H-benzotriazole (1) has been synthesized in a three step procedure starting from 2,4-dimethyl-N-(2-nitrophenyl)benzamide via a 5-(2,4- dimethylphenyl)-1-(2-nitrophenyl)-1H-tetrazole intermediate. Its structure and those of Tinuvin P and 2-phenyl-2H-benzotriazole (5) have been studied by multinuclear NMR (1H-, 13C- and 15N-) in solution and in the solid state. X-ray diffr...

2008
Zoltán Szabó

It is well-known that metal ion complexes are essential in various biological systems, including those with adenosine nucleotides which are substrates for a large number of enzymatic processes. The interactions of various metal ions with adenosine nucleotides have been intensively studied by multinuclear NMR spectroscopy. Nucleotides are polydentate ligands with various potential binding sites,...

Journal: :Dalton transactions 2012
Paul Marshall Robert L Jenkins William Clegg Ross W Harrington Samantha K Callear Simon J Coles Ian A Fallis Athanasia Dervisi

The butyl and isopropyl derivatives (4I, 5Br) of chiral pool derived bis-imidazolium dehydrohexitol salts have been prepared. The ditopic N-heterocyclic carbenes 4 and 5 form dinuclear Ag(I) and Pt(II) complexes. All compounds were fully characterised by multinuclear NMR spectroscopy. The bis-imidazolium salt 4I and platinum complexes cis-[Pt(2)(μ-2)(dmso)(2)Cl(4)] and cis-[Pt(2)(μ-4)(dmso)(2)C...

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